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authorMichael Ellerman <michael@ellerman.id.au>2006-01-25 21:48:48 +1300
committerPaul Mackerras <paulus@samba.org>2006-02-07 21:28:38 +1100
commitcdc3ee8f2061bafe7593bab0096a0e711408b0f9 (patch)
tree82cd90ed8d38f27e76a06a0049660be092fdd9a4 /arch/powerpc/kernel/prom_init.c
parent8c20fafa8548917fdbbd95588494498dd901b375 (diff)
[PATCH] powerpc: Refuse to boot a kdump kernel via OF
You can't boot a kdump kernel via OF, not reliably anyway, the kernel being at 32 MB conflicts with the zImage wrapper etc. and it blows up. It's trivial to check in prom_init though, and this is early enough that we can actually drop back to OF where a reset-all will get you going again, which is kinda nice. I think this should go in for 2.6.16. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/prom_init.c')
-rw-r--r--arch/powerpc/kernel/prom_init.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 7881ec96ef1..ec7153f4d47 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -2098,6 +2098,10 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
*/
prom_init_stdout();
+ /* Bail if this is a kdump kernel. */
+ if (PHYSICAL_START > 0)
+ prom_panic("Error: You can't boot a kdump kernel from OF!\n");
+
/*
* Check for an initrd
*/